Ryzen Embedded 7645 vs Ultra 7 251HX
Contents
Primary details
Comparing processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 244 | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Laptop | Desktop processor |
| Series | Intel Arrow Lake | no data |
| Designer | Intel | AMD |
| Manufacturer | no data | TSMC |
| Architecture codename | Arrow Lake-HX (2025−2026) | Raphael (2023−2026) |
| Release date | 1 April 2026 (less than a year ago) | 14 November 2023 (2 years ago) |
Detailed specifications
Basic parameters of Core Ultra 7 251HX and Ryzen Embedded 7645: number of cores, number of threads, base frequency and turbo boost clock, lithography, cache size and multiplier lock state. These parameters indirectly say of CPU speed, though for more precise assessment you have to consider their test results.
| Physical cores | 18 (Octadeca-Core) | 6 (Hexa-Core) |
| Threads | 18 | 12 |
| Base clock speed | 2.5 GHz | 3.8 GHz |
| Boost clock speed | 5.1 GHz | 5.1 GHz |
| L1 cache | no data | 64 KB (per core) |
| L2 cache | 30 MB | 1 MB (per core) |
| L3 cache | 30 MB | 32 MB (shared) |
| Chip lithography | 3 nm | 5 nm |
| Die size | no data | 71 mm2 |
| Number of transistors | no data | 6,570 million |
| 64 bit support | + | + |
Compatibility
Information on Core Ultra 7 251HX and Ryzen Embedded 7645 compatibility with other computer components: motherboard (look for socket type), power supply unit (look for power consumption) etc. Useful when planning a future computer configuration or upgrading an existing one. Note that power consumption of some processors can well exceed their nominal TDP, even without overclocking. Some can even double their declared thermals given that the motherboard allows to tune the CPU power parameters.
| Number of CPUs in a configuration | no data | 1 |
| Socket | no data | AM5 |
| Power consumption (TDP) | no data | 65 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Core Ultra 7 251HX and Ryzen Embedded 7645. You'll probably need this information if you require some particular technology.
| AES-NI | - | + |
| AVX | - | + |
| Precision Boost 2 | no data | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Core Ultra 7 251HX and Ryzen Embedded 7645 are enumerated here.
| AMD-V | - | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Core Ultra 7 251HX and Ryzen Embedded 7645. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | no data | DDR5 |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | Intel Graphics 4-Core iGPU (Meteor / Arrow Lake) (300 - 1800 MHz) | AMD Radeon Graphics |
Peripherals
Specifications and connection of peripherals supported by Core Ultra 7 251HX and Ryzen Embedded 7645.
| PCIe version | no data | 5.0 |
| PCI Express lanes | no data | 24 |
Pros & cons summary
| Integrated graphics card | 9.37 | 1.85 |
| Recency | 1 April 2026 | 14 November 2023 |
| Physical cores | 18 | 6 |
| Threads | 18 | 12 |
| Chip lithography | 3 nm | 5 nm |
Ultra 7 251HX has 406% faster integrated GPU, an age advantage of 2 years, 200% more physical cores and 50% more threads, and a 67% more advanced lithography process.
We couldn't decide between Intel Core Ultra 7 251HX and AMD Ryzen Embedded 7645. We've got no test results to judge.
Be aware that Core Ultra 7 251HX is a notebook processor while Ryzen Embedded 7645 is a desktop one.
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